GHK-Cu
GHK-Cu (Copper Peptide)
The gold standard regenerative peptide for skin health, hair growth, and wound healing.
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Quick Reference
| Peptide Class | Copper-binding tripeptide |
| Half-Life | Short (topical application provides sustained local delivery) |
| Administration | Topical serum/cream, Subcutaneous injection (systemic) |
| Typical Dosage | Topical: 1–5% concentration; Injectable: 1–2 mg/day |
| Cycle Length | 8–12 weeks (injectable); ongoing (topical) |
| Evidence Level | Moderate Preclinical / Emerging Human |
| Legal Status | Research compound (injectable); widely available in cosmetic products (topical) |
| Approximate Cost | $20–$60 (topical); $30–$70/vial (injectable) |
How GHK-Cu Works
Stimulates collagen and elastin synthesis, activates antioxidant enzymes, and promotes hair follicle cycling.
GHK-Cu is a naturally occurring copper-binding tripeptide (Gly-His-Lys) that declines significantly with age. It exerts its effects through multiple mechanisms: stimulating collagen and elastin synthesis in fibroblasts, activating superoxide dismutase and other antioxidant enzymes, promoting angiogenesis in wound healing, and modulating the expression of over 4,000 genes involved in tissue remodeling. In hair follicles, it promotes the transition from the resting (telogen) to the active growth (anagen) phase.
Evidence Base
Preclinical Evidence
Extensive in vitro and animal data supporting collagen synthesis, wound healing acceleration, and hair follicle stimulation. GHK-Cu is one of the most studied peptides in dermatological research.
Human Evidence
Multiple clinical studies in cosmetic dermatology demonstrate improvements in skin firmness, fine lines, and wound healing. Hair growth studies show improvements in hair density and thickness comparable to minoxidil in some trials.
Anecdotal Evidence
GHK-Cu has a strong track record in the cosmetic and biohacking communities. Topical users consistently report improvements in skin texture and firmness within 4–8 weeks. Injectable users report more systemic effects including improved wound healing and skin quality across the body.
Key PubMed References:
Safety Profile
Side Effects
Topical: mild skin irritation in sensitive individuals. Injectable: injection-site reactions, mild flushing. Generally considered very safe.
Contraindications
No established contraindications. Caution with excessive copper intake from other sources.
PeptidePilot Assessment
GHK-Cu is PeptidePilot's top recommendation for users in the Skin, Hair & Appearance domain. In our algorithm, it scores highest for users who report skin aging concerns, hair thinning, or wound healing goals. It is also a strong secondary recommendation for users in the Recovery domain, where its anti-inflammatory and healing properties complement BPC-157 and TB-500.
📊 19% of PeptidePilot users with skin or hair concerns receive GHK-Cu as their top match
Frequently Asked Questions
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